Some of my recurring Calendar events consist of lists of entries that get frequently updated. In the particular case of concern here, in the course of time a string such as “abcd1234” was changed to “abcd12345”, then later again to “abcd123456”. I would expect “abcd1234” and “abcd12345” to be gone into oblivion, especially as when editing an event I always select ‘This and future’ or, occasionally, ‘This’, but never ‘All’.
Unfortunately, this seems not to be the case. Searching the drive with a tool like FAF (Find Any File) → Text content/contains phrase/cd1234 results in the following files turning up: event_data.dat, event_data.dat-wal, event_index.dat-wal and event_index.dat, all of which are located in ~/Library/Application Support/eM Client/Local Folders/. Opening them in a text editor reveals not only “abcd123456”, but also the two “abcd1234” and “abcd12345” inside the text. In other words, these files appear to be a sort of backup of versions of Calendar events that have long been dismissed — unencrypted backups that can easily read by anyone that happens to have access to my machine. Not desirable.
It seems that only the past occurrences of non-recurrent events get deleted (which time lapse?), not those of recurrent events: going back throughout the years, I found current recurrent events way before I began using eMC, and maybe even before eMC even existed; for example, on 01.01.2007, the event mentioned above, which contains “abcd123456”. Whether this date is a “retroactive limit” proper to eMC (similar to Apple’s 1970 or Microsoft’s 1904) or it’s the date the event was created in my previous mail client, I cannot tell, but what’s relevant is that what shows up when opening it on 01.01.2007 is the text of today’s up-to-date variant.
Is there something I’m missing, or can this be remedied, a clean-up of sorts?